What Kelly's "sigh" said: That Eric Trump, like his father, was tone-deaf -- he didn't understand that sexual harassment isn't something a woman can simply resist or ignore, but rather something that has a profoundly negative affect on her life and her career.

But it said something about Kelly, too. Despite staying silent about the sexual harassment allegations against Ailes, Kelly has cooperated with the lawyers investigating the former Fox News chief's past behavior. Sources with knowledge of the matter say she's informed them about unwanted advances by Ailes dating back a decade, a few years after she joined Fox.

Privately, Kelly is said to welcome Ailes' ouster. For -- as her tweet on Tuesday shows -- she takes the issue of sexual harassment in the workplace very seriously.